Media player Apps
Playback of video, audio, and any other type of media has never been easier, with the ever ubiquitous VLC media player able to successfully play back any media you throw at it. For those that want to use other software that might, say, have better library management, options like Kodi and iTunes are also viable.
VLC Media Player
VLC is a free and open source cross-platform multimedia player and framework. Owned by the non-profit organization VideoLAN.
Kodi
Kodi, formerly XBMC, is a free and open source media player and entertainment center for Linux, Mac OS X, Windows, XBox, and iOS.
MPC-HC
MPC-HC is an extremely light-weight, open source media player for Windows. It supports all common video and audio file formats available for playback.
iTunes
Media player, media library, Internet radio broadcaster, and iPhone device management application.
Winamp
Winamp is a media player for Windows and OS X developed by Justin Frankel and Dmitry Boldyrev by their company Nullsoft, which they later sold to AOL, who sold to Radionomy in...
Plex
Plex bridges the gap between your computer and your home theater, doing so with a visually appealing user interface that provides instant access to your media.
Media Player Classic
Discontinued
The project is no longer developed. The currently active fork is 
MPC-HC . Latest version, 6.4.9.1, released in April 2011, can be still downloaded from FreeCodec.com
Media Player Classic was designed to look just like 
Windows Media Player 6.4, but with many additional new features.
PotPlayer
Potplayer is a minimalist media player that has an extensive range of configurable options to choose from and lots of functionality.
MediaMonkey
MediaMonkey is a music player and a music library manager with support for 50,000+ files and many features for organizing, tagging, converting and burning your music.
Songbird
Discontinued
Songbird’s operations and associated services was discontinued on June 28, 2013. The source code can be still downloaded from Mozilla Development Center.
With a focus on fans, Songbird personalizes music content from the artists you love the most. Share your own photos with artists and other fans or discover new artists, all while listening to your music on your computer. Free download for PC! .
SMPlayer
SMPlayer intends to be a complete front-end for MPlayer, from basic features like playing videos, DVDs, and VCDs to more advanced features like support for MPlayer filters and...
Banshee
Discontinued
No new releases and features since 2014. Latest versions, 2.6.2 (stable) and 2.9.1 (development), released in February and March 2014, are still working and can be downloaded from the official website.
Play your music and videos. Stay entertained and up to date with podcasts and video podcasts. Discover new music with 
Last.fm radio.
Windows Media Player
The media player provided pre-installed with all modern Windows versions (7 and higher): Windows Media Player 12 plays more music and video than ever, including Flip Video and...
Miro
Discontinued
No updates since 2013. Youtube intergration broken because of no updates since youtube API changed. See changelog: http://ftp.osuosl.org/pub/pculture.org/Miro/
Miro (formerly Democracy Player) is a free and open source internet TV application, media library, and video player.
GOM Media Player
Bundleware
The installer contains additional bloatware that can hijack your browser's settings. Be careful during the installation: Forum
GOM Media Player (Gretech Online Movie Player) is a freeware media player.
Quod Libet
A extensible Music player with Podcast support, web radio, playlists and many more. As it is written in Python, writing new plug-ins is really easy.
Stremio
Media center allowing to watch movies, series, YouTube channels instantly. You can watch in HD, with subtitles, and easily cast any file to TV through DLNA, Chromecast, AppleTV!
Stremio also gives you notifications for new episodes / movies.
QuickTime Player
Watch Internet video, HD movie trailers, and personal media clips. Whether it’s on the web or on your desktop, QuickTime Player brings your digital media brilliantly to life.
UMPlayer
Discontinued
No more updates, latest downloads from 2011: https://sourceforge.net/projects/umplayer/files/
UMPlayer is a movie player which runs on many systems.
Videos
Videos (previously Totem) is the official movie player of the GNOME desktop environment based on xine-lib or GStreamer.
SPlayer
Discontinued
The program is no longer updated. Latest version, 3.7 Build 2437, released in August 2011, can be still downloaded from the official website.
SPlayer is a player that supports all popular formats, including DVDRip, HDTV, RMVB, QuickTime, MPEG-2, MPEG-4, AC3/DTS, VP3/6/7, Indeo, XVD, OGG / OGM, APE, FLAC, TTA, AAC, MPC...